-----BEGIN PGP SIGNED MESSAGE-----
AUSCERT External Security Bulletin Redistribution
multiple vulnerabilities fixed in freerdp
11 February 2019
AusCERT Security Bulletin Summary
Operating System: Debian GNU/Linux 8
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
CVE Names: CVE-2018-8789 CVE-2018-8788 CVE-2018-8787
- --------------------------BEGIN INCLUDED TEXT--------------------
Package : freerdp
Version : 1.1.0~git20140921.1.440916e+dfsg1-13~deb8u3
CVE ID : CVE-2018-8786 CVE-2018-8787 CVE-2018-8788 CVE-2018-8789
Debian Bug :
For the FreeRDP version in Debian jessie LTS a security and functionality
update has recently been provided. FreeRDP is a free re-implementation
of the Microsoft RDP protocol (server and client side) with freerdp-x11
being the most common RDP client these days.
With help from FreeRDP upstream (cudos to Bernhard Miklautz and
Martin Fleisz) we are happy to announce that RDP proto v6 and CredSSP
v3 support have been backported to the old FreeRDP 1.1 branch.
Since Q2/2018, Microsoft Windows servers and clients received an
update that defaulted their RDP server to proto version 6. Since this
change, people have not been able anymore to connect to recently
updated MS Windows machines using old the FreeRDP 1.1 branch as found
in Debian jessie LTS and Debian stretch.
With the recent FreeRDP upload to Debian jessie LTS, connecting to
up-to-date MS Windows machines is now again possible.
FreeRDP contained an integer truncation that lead to a heap-based
buffer overflow in function update_read_bitmap_update() and resulted
in a memory corruption and probably even a remote code execution.
FreeRDP contained an integer overflow that leads to a heap-based
buffer overflow in function gdi_Bitmap_Decompress() and resulted in a
memory corruption and probably even a remote code execution.
FreeRDP contained an out-of-bounds write of up to 4 bytes in function
nsc_rle_decode() that resulted in a memory corruption and possibly
even a remote code execution.
FreeRDP contained several out-of-bounds reads in the NTLM
authentication module that resulted in a denial of service
For Debian 8 "Jessie", these security problems have been fixed in version
We recommend that you upgrade your freerdp packages.
Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
- --------------------------END INCLUDED TEXT--------------------
You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to email@example.com
and we will forward your request to the appropriate person.
NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
Australian Computer Emergency Response Team
The University of Queensland
Internet Email: firstname.lastname@example.org
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
-----BEGIN PGP SIGNATURE-----
-----END PGP SIGNATURE-----